BUY New & Used Commercial Backup Generators 1000kW-1499kW GENERATORS FOR SALE

Industries That Use 1000 kW to 1499 kW Generators

At one megawatt the connected motor load sets the requirement, and the project grows an engineered pad, permitted transport, and an electrical design that gets reviewed rather than simply specified.

• Data centers: Enterprise and colocation floors with uptime obligations written into tenant agreements.
• Hospitals: Healthcare campuses backing more than the code-minimum essential system, where transfer timing is prescribed rather than chosen.
• Cities and municipalities: Operations centers, emergency operations facilities, and large pump stations serving several buildings off one machine.
• Water districts: Treatment plants and high-lift pump stations, almost all motor load, where one pump start can set the size.
• Aggregate and rock crushing: Crushing and screening plants where the generator is the primary source and large motors cycle all day.
• Mining: Sites off-grid or on a weak feed, usually running the generator as prime power rather than backup.
• Manufacturing and processing: Plants with substantial rotating equipment, where the surge from one chiller or compressor often matters more than the steady draw.

Sizing notes by sector are on our industries served pages.

1000 kW to 1499 kW Generators at a Glance

• Apparent power: 1,250 to 1,874 kVA at 0.8 power factor.
• Current: 1,504 A at 1000 kW and 1,885 A at 1250 kW at 480V, against 174 A and 218 A at 4160V, on our chart.
• Diesel burn at full load: 71.1 gal/hr at 1000 kW and 88.8 gal/hr at 1250 kW on our chart, or roughly 1,700 to 2,130 gallons a day.
• Weight: 18,766 to 20,463 lb for an open Generac SD1000 diesel and 22,798 to 24,495 lb for the open SG1000 gas set, before tank or enclosure.
• Most common format: pad-mounted diesel standby at 1000 to 1250 kW, EPA Tier 2, with natural gas power modules toward the top of the band.
• Decision that drives cost: output voltage and switchgear scope, which often move the budget more than the choice of generator.

Where the Load Study Lands Inside 1000 kW to 1499 kW

Each band inside this range draws a different kind of unit in our listings.

For a single size, see our 1000 kW generator page, or the 800 kW and 1500 kW pages on either side of this range.

Megawatt-Class Units That Have Crossed Our Yard

Units listed in this range now, with the kW as we listed each one:

The split at 1,250 kW is the thing to notice. Every diesel here sits between 1,000 and 1,250 kW, and every used one has fewer than 1,000 hours, which is what standby duty looks like. Above 1,250 kW, everything is natural gas, and the used gas modules carry thousands of hours, up to 25,440 on the XQ1475G, because they have done long-hour work. Whatever is on the ground today is in the listings above.

Spec Sheets Bracketing One Megawatt

Published figures for the two Generac sets at 1000 kW, with the sheets just below and above the band for scale:

The SD800 weighs more than the SD1000 and lists a higher full-load burn, so engine and frame, not the kW on the nameplate, decide weight and fuel. The gas SG1000 needs a 49.0 L engine to do what the diesel does with 30.6 L, and that shows up in its weight and footprint.

Diesel Burn From 1000 kW to 1500 kW on Our Chart

Our diesel fuel consumption chart has two rows inside this range and one at its upper edge:

Manufacturer sheets land close to the chart at this size. Generac lists 38.0, 54.7, and 70.9 gal/hr for the SD1000 at half, three-quarter, and full load, against 71.1 at full load on the chart’s 1000 kW row, and Kohler lists 105.9 gal/hr at full standby for the KD1500 against 106.5 on the chart.

The tank is where a megawatt set gets big. Generac offers the SD1000 with tanks of 840, 1,680, 2,520, 3,360, and 5,040 gallons, rated at 12, 24, 36, 48, and 72 hours. A 5,040-gallon tank under the skid changes the pad load and the delivery plan, so both start from the tank choice.

480V or 4160V: Current at a Megawatt

Three-phase current at 0.8 power factor, from our generator amperage chart:

This is the band where medium voltage first becomes a real option instead of a requirement. At 480V a 1000 kW set already pushes 1,504 A, which means large breakers and several parallel conductor runs per phase. At 4160V the same set carries 174 A, but the alternator, cable terminations, and switchgear all move to medium-voltage equipment. Kohler’s KD1500 sheet shows the pattern on a real unit, 2,256 A at 277/480V and 261 A at 2400/4160V, and makes a generator heater and thermocouple input/output standard on its 4160V builds.

A practical rule: if the facility’s service and distribution are 480V and the set sits close to the switchgear, stay at 480V through this band. Medium voltage earns its cost when the plant already distributes at 4160V, when the set is far from the load, or when you expect to parallel more units later. Our power calculators will get you a working load figure before you call.

One Megawatt Set or Your First Paralleled Pair?

One set, unless the spec calls for redundancy. This is the range where buyers first face that choice, and for many it’s the reason they stop here rather than moving up.

A single 1000 or 1250 kW unit means one engine, one set of controls, one fuel system, and a transfer switch rather than a paralleling bus. Once N+1 is written into the design, the math changes: a 1000 kW critical load then needs two machines that can each carry it, and the paralleling switchgear, controls, and commissioning sequence become part of the project. Make that call in design, because it changes the pad, the switchgear, and often the voltage. Send us the load profile and we’ll price both layouts.

Power Module or Pad-Mounted Standby Set?

A pad-mounted standby set for permanent backup, a power module for temporary, rental, or relocatable duty.

The Cummins DQFAD and DQGAA and the Caterpillar D1000GC are standby sets built to live on a pad behind a transfer switch. The Atlas Copco QAC1200 FLX, listed as rental grade, the Baldor IDLC1250-2M, and the Cummins QSK50 module are packaged to be moved and set again. For a pad-mount, plan the footprint from the sheet: Generac’s steel enclosures for the SD1000 share a 304.0 x 105.7 x 137.0 inch footprint and add 3,761, 5,005, or 6,901 lb for Level 0, 1, or 2, before the tank. Kohler notes an enclosed silencer cuts the KD1500 radiator’s 50 °C rating by 5 °C. Pad-mounted units are under industrial standby generators. Shipping terms are in our shipping and returns policy, and we coordinate logistics as part of the sale.

Diesel or Natural Gas Past 1,250 kW?

Diesel for emergency standby through most of this range, natural gas when the set will run long hours and a gas line can supply it.

Diesel picks up load fastest and keeps its fuel on site, which is why nearly every standby set we list from 1,000 to 1,250 kW is diesel. Higher in the band our listings turn to gas, and the hours on the used gas modules show long-hour duty. Gas supply is the hard part: Generac’s SG1000 draws 6,021 scfh at half load and 11,243 scfh at full load and needs 14 to 28 inches of water column, the highest supply pressure on any of our single-size pages, so confirm pressure and flow with the gas utility before choosing it. Diesel units are under industrial diesel generators and gas units under industrial natural gas generators.

Ratings and Hours on a Used Megawatt Set

Compare units on the rating that matches how they’ll run. Generac rates the SD800 at 800 kW standby and 720 kW prime, and Kohler rates the KD1500 at 1500 kW standby and 1350 kW prime at 480V. A set that will carry load for long stretches should be priced on its prime figure.

Hours tell you how a used unit lived: our 2007 DQFAD standby sets came in at 198 and 833 hours, while the gas modules at the top of the band run into the thousands. Low hours on an older standby set are normal, so service records, alternator condition, and controls generation matter as much as the meter. New is the answer when a spec requires a factory warranty, a current emissions tier, or new equipment outright, which comes up often in municipal and healthcare work. Browse used industrial generators and new industrial generators side by side.

Owning a Megawatt Set Versus Renting One

Rent to bridge a failure, a plant turnaround, or a rebuild. Buy for permanent standby, since the pad, switchgear, and fuel system get built either way and the set runs only a few hours a year. Our rental side, Stag Power Rentals, handles short-term megawatt work, and our generator financing options help when the obstacle is a capital cycle rather than the case for the machine.

Too Small or Too Large for 1000 kW to 1499 kW?

A megawatt reads like a safe number, but a diesel held far below its rated load develops wet stacking, and an undersized set risks the outage you bought it to prevent.

If the load is under 1000 kW, drop a band and put the difference toward installation. If it pushes past 1500 kW, or redundancy means no single unit should carry the facility, step up. You can also browse every output we carry on shop by kW.

Inspected, Load Tested, and Backed After the Sale

Every generator we sell goes through a 22-point inspection and load bank testing before it ships. At a megawatt, a problem found in our yard is far cheaper than one found after the crane has left. We’ve been buying and selling industrial generators for over a decade. Every purchase carries our 30-day IronClad warranty, and our service team covers scheduled testing, industrial generator repair, and emergency service after commissioning.

Ready to Buy a 1000kW – 1499kW Generator?

Send us your load, voltage, and site conditions, and we’ll tell you whether one set at 480V covers it or whether you’re looking at medium voltage or a paralleled pair, then show you what’s on the ground in new and used. Look through our used industrial generators and new industrial generators, or contact us and we’ll run the load study with you.